Winter Prep Checklist for San Bernardino, CA
Here's the order to prep San Bernardino, CA for winter, set by local freeze data. Your first deadline is December 1 — prevent frozen pipes — and the sequence runs through the cold season into spring below.
Your winter prep order for San Bernardino
- DecemberDecember 1 — Prevent Frozen PipesSee details →
- DecemberDecember 19 — Store Your MotorcycleSee details →
- DecemberDecember 22 — Winterize SprinklersSee details →
- DecemberDecember 22 — Winterize Your RVSee details →
- DecemberDecember 25 — Winterize Your BoatSee details →
- JanuaryJanuary 1 — Test Your Car BatterySee details →
- JanuaryJanuary 27 — Test Your Sump PumpSee details →
All nine San Bernardino deadlines, from NOAA California freeze and snowfall normals, plotted across the season.
Dates are local deadlines derived from NOAA 1991–2020 freeze and snowfall normals for San Bernardino. Live outlooks on each linked page can move the urgency earlier.
How the order is set
Each task is pinned to San Bernardino's own NOAA 1991–2020 freeze and snowfall normals, then ordered by its local deadline. Sprinklers, RVs, and boats key off the first 28°F freeze; pipes and motorcycles off the first freezing night; snow blowers and roofs off the first plowable snow. Follow any link for the live outlook and a checklist. Helping family or friends nearby? Compare the full winter checklist for Salinas and San Bruno.
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Winter prep in San Bernardino: related searches
This page answers the questions San Bernardino homeowners search every fall: when to winterize sprinklers in San Bernardino, when the first freeze usually hits California, when to blow out irrigation lines, protect pipes, and get the snow blower serviced — all from the nearest NOAA station, not a national average.
Data: NOAA 1991–2020 normals via Redlands, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 25, 2026.